stackoverflow.com Stack Overflow

Mobile Usability

92/100

Good

Mobile Speed

71/100

Medium

Last tested: 2017-08-27

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stackoverflow.com Mobile Usability: 92/100
stackoverflow.com Mobile Usability Test Quick Overview

Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.
The following tap targets are close to other nearby tap targets and may need additional spacing around them.
The tap target <a href="/questions/ask">Ask</a> is close to 1 other tap targets.
The tap target <a href="/questions/438…ze-overlapping">CSS - Backgrou…ze overlapping</a> and 76 others are close to other tap targets.
The tap target <a href="/questions/438…g?lastactivity" class="-time">51 secs ago</a> and 191 others are close to other tap targets.
The tap target <a href="/users/5782520/varsha-ghodki" class="author">varsha ghodki</a> and 86 others are close to other tap targets.
The tap target <a href="/questions/tagged/apache-spark" class="post-tag">apache-spark</a> and 8 others are close to other tap targets.
stackoverflow.com Mobile Speed: 71/100
stackoverflow.com Mobile Speed Test Quick Overview

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 3 blocking script resources and 1 blocking CSS resources. This causes a delay in rendering your page.
https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js
https://cdn.sstatic.net/Js/stub.en.js?v=81b5b0da091e
https://cdn.sstatic.net/Js/mobile.en.js?v=8c3bd5e12250
Optimize CSS Delivery of the following:
https://cdn.sstatic.net/Sites/stackoverflow/mobile.css?v=639271aa3cb1
Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
https://www.google-analytics.com/analytics.js (2 hours)
Optimize images

Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 2.9KiB (21% reduction).
Compressing https://cdn.sstatic.net/img/share-sprite-new.png?v=e1b8bd67bc12 could save 2.9KiB (21% reduction).

stackoverflow.com Mobile Resources


Total Resources17
Number of Hosts9
Static Resources9
JavaScript Resources7
CSS Resources1

stackoverflow.com Mobile Resource Breakdown